24. STUDY ON BLOOD URIC ACID-LOWERING EFFECTS AND TOXICITY OF DRIED LOLOT LEAVE EXCITEMENT ON EXPERIMENTAL ANIMALS

Duong Anh Tuyet1, Ngo Nguyen Quynh Anh1, Vu Thi Minh Thu1, Nguyen Thi Thu Huyen1, Pham Thi Hang1, Nguyen Thi Dong2, Nguyen Thuy Duong3
1 Hai Duong Central College of Pharmacy
2 Department of Science, Technology and Training, Ministry of Health
3 Hanoi University of Pharmacy

Main Article Content

Abstract

Objective: The research aimed to investigate the impact of reducing blood uric acid and the toxicity of dried lolot leaf extract. The specific goals were to assess the efficacy of lowering blood uric acid and evaluate the acute and semi-chronic toxicity of the extract.


Research subjects and methods: The study involved evaluating the uric acid-lowering effect of dried lolot leaf extract using a model inducing acute hyperuricemia by injecting potassium oxonate through the peritoneum in white mice. Additionally, acute toxicity tests were conducted on white mice over a 14-day period, and semi-chronic toxicity tests were performed on rats over 28 days.


Results: The dried lolot leaf extract, administered at a dose of 300 mg/kg, demonstrated effectiveness in lowering blood uric acid, showing a reduction rate of 36.3% (p<0,05) compared to the control group. Importantly, the dried lolot leaf extract exhibited no acute toxicity at the tested doses, as evidenced by the absence of fatalities in the test batches, preventing the determination of LD50. Furthermore, in semi-chronic toxicity tests on mice subjected to repeated doses (330 mg/kg/day and 990 mg/kg/day) for 28 days, the extract did not display toxicity across parameters assessing general condition, liver function, kidney function, and hematopoietic function.


Conclusion: The dried lolot leaf extract was found to effectively lower uric acid without exhibiting signs of toxicity in the experimental animals.

Article Details

References

[1] Camilla M, Giuseppe L, Recent updates
on worldwide gout epidemiology, Clinical
Rheumatology volume, 39, 2020, pp. 1061-1063.
[2] Mai Tất Tố, Vũ Thị Trâm, Đào Thị Vui, Dược lý
học tập 2, Nhà xuất bản Y học, 2018.
[3] Thuy Duong Nguyen, Phuong Thien Thuong,
In Hyun Hwang et al., Anti-Hyperuricemic,
Anti-inflammatory and Analgesic Effect of
Siegesbeckia orientalis L. Resulting from the
Fraction with High Phenolic Content, BMC
Complementary and Alternative Medicine
17:191, 2017.
[4] Nguyen Thuy Duong, Pham Duc Vinh,
Phuong Thien Thuong et al., Xanthine oxidase194
inhibitors from Archidendron clypearia
(Jack.) I.C. Nielsen: Results from systematic
screening of Vietnamese medicinal plants,
Asian Pacific Journal of Tropical Medicine,
10(6): 549–556, 2017.
[5] Bộ Y tế, Hướng dẫn thử nghiệm lâm sàng và
tiền lâm sàng thuốc đông y, thuốc từ dược liệu,
https://thuvienphapluat.vn/van-ban/The-thaoY-te/
Quyet-dinh-141-QD-K2DT-2015-Huongdan-thu-
nghiem-tien-lam-sang-lam-sang-thuocdong-y-
414589.aspx, 2015.
[6] OECD, Test Guidelines for Chemicals, OECD,
2021; Section 4, Test No. 407,420,423,425.
[7] Đỗ Trung Đàm, Phương pháp xác định độc tính
của thuốc, Nhà xuất bản Y học, 2014.
[8] Ridtitid W, Ruangsang P, Reanmongkol W
et al., Studies of the anti-inflammatory and
antipyretic activities of the methanolic extract of
Piper sarmentosum Roxb. leaves in rats, J. Sci.
Technol., 29(6), 2007, pp. 1519-1526.
[9] Zakaria H, Patahuddin AS, Mohamad DA
et al., In vivo anti-nociceptive and antiinflammatory
activities of the aqueous extract of the leaves of
Piper sarmentosum, Journal of Ethnopharmacology,
128(1), 2010, pp. 42-48.